Body, generic

B00E0 Third Row Left Seat Belt Pretensioner B Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00E0 points to a second pretensioner stage (B) on the left seat of the third row. Such a stage would be an extra device next to the retractor, typically a lap or anchor tensioner that pulls on the lower belt end. No carmaker publishes B00E0. Mercedes-Benz, which does fit third-row tensioners (the 2017 GLS manual lists them for every third-row belt), logs the left third-row retractor under B00E7 in topic LI54.21-P-070658, i.e. on the C slot, and never names a B stage back there. GM describes anchor units only for front seats, and Joyson pairs its lap pretensioner with a retractor unit against submarining. A stored code lights the airbag lamp; the stage is treated as not available.

Likely causes

Plug of the lap or anchor tensioner at the left third-row seat loose, unlatched or corroded
Lead strained or chafed by folding and stowing the third-row seat
Airbag module coded for a B stage the vehicle does not have (after module or seat replacement)
Internal open or short in the tensioner squib

Symptoms

  • Airbag warning lamp lit
  • Lap belt at the left third-row seat may not be pulled tight in a crash
  • Safety note: pyrotechnic part – work only with the battery disconnected and the wait time observed, preferably at a specialist workshop

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–600
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

third row left pretensioner bsquib circuitsrs control module

Related codes

B00E1B00E2B00E7B0076

References: mbusa.com, static.nhtsa.gov, gmstc.com, joysonsafety.com.